diff --git a/.github/workflows/dependencies_matches.yaml b/.github/workflows/dependencies_matches.yaml
new file mode 100644
index 0000000..5552539
--- /dev/null
+++ b/.github/workflows/dependencies_matches.yaml
@@ -0,0 +1,74 @@
+name: Check if dependencies match
+# Sometimes we have the libraries in two (or more) places 
+# at the same time, this check makes sure that we do use
+# the same version of said libraries.
+on: [push]
+
+jobs:
+  wownero-seed:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+      - name: Patch sources
+        run: |
+          git config --global --add safe.directory '*'
+          git config --global user.email "ci@mrcyjanek.net"
+          git config --global user.name "CI mrcyjanek.net"
+          ./apply_patches.sh monero
+          ./apply_patches.sh wownero
+      - name: obtain hashes
+        run: |
+          set -x
+          pushd external/wownero-seed
+            echo "EXTERNAL_WOWNEROSEED=$(git rev-parse HEAD)" >> $GITHUB_ENV
+          popd
+          echo "WOWNERO_WOWNEROSEED=$(cat wownero/contrib/depends/packages/wownero_seed.mk | grep _download_file | tr '=.' '\n' | head -2 | tail -1)" >> $GITHUB_ENV
+      - name: compare hashes
+        run: |
+          if [[ "x$WOWNERO_WOWNEROSEED" == "x" ]];
+          then
+            echo "Unable to obtain wownero seed from wownero repo"
+            exit 1
+          fi
+          if [[ ! "x$EXTERNAL_WOWNEROSEED" == "x$WOWNERO_WOWNEROSEED" ]];
+          then
+            echo "external/wownero-seed doesn't match wownero/contrib/depends/packages/wownero_seed.mk checksum"
+            exit 1
+          fi
+  polyseed:
+    strategy:
+      matrix:
+        coin: [monero, wownero]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+      - name: Patch sources
+        run: |
+          git config --global --add safe.directory '*'
+          git config --global user.email "ci@mrcyjanek.net"
+          git config --global user.name "CI mrcyjanek.net"
+          ./apply_patches.sh ${{ matrix.coin }}
+      - name: prepare
+        run: |
+          set -x
+          pushd ${{ matrix.coin }}/contrib/depends
+            make download # sorry, this is the easiest way
+            mkdir sources/polyseed
+            pushd sources/polyseed
+              tar xzf ../polyseed*.tar.gz
+            popd
+          popd
+      - name: diff
+        run: |
+          OUTPUT=$(diff -ra external/polyseed ${{ matrix.coin }}/contrib/depends/sources/polyseed/* | grep -v .git | wc -l)
+          if [[ ! "x$OUTPUT" == "x0" ]];
+          then
+            diff -ra external/polyseed ${{ matrix.coin }}/contrib/depends/sources/polyseed/*
+            exit 1
+          fi
diff --git a/external/polyseed b/external/polyseed
index b7c35bb..3ef3669 160000
--- a/external/polyseed
+++ b/external/polyseed
@@ -1 +1 @@
-Subproject commit b7c35bb3c6b91e481ecb04fc235eaff69c507fa1
+Subproject commit 3ef366993258a6f1c837d4908e3e4afb2cfefff7